期刊
APPLIED SURFACE SCIENCE
卷 317, 期 -, 页码 776-786出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.07.129
关键词
Heparin; Laminin; Endothelial cell; Re-endothelialization; Hemocompatibility
类别
资金
- Key Basic Research Program [2011CB606204]
- National Natural Science Foundation of China [31170916, 31270020, 31470921]
- Fundamental Research Funds for the Central Universities [SWJTU11ZT11]
Surface biofunctional modification of coronary artery stent to improve the hemocompatibility and selectively accelerate endothelium regeneration but prevent restenosis have been become a new hotspot. For this, a novel method was developed in this work by co-immobilization of Ln and heparin complex on poly-L-lysine modified Ti surface. Take the advantage of the specific interaction between Ln and heparin, Ln and heparin complexes with different concentration ratios were set up for creating different exposure density of these two types of biomolecules. According to biocompatibility evaluation results, the Hep/Ln complexes modified surface displayed less platelet adhesion and activation. Especially, on L(150)H and L(200)H surface, the AT III binding quantity, APTT value and anti-coagulation property of modified surface were significantly promoted. Furthermore, the adherent density and proliferation activity of ECs and EPCs were positively correlated with Ln concentration. Notably, the proliferation of both ECs and EPCs on L(100)H, L(150)H and L(200)H surface were greatly promoted. Another hand, the proliferation activity of SMCs was significantly inhibited on Hep/Ln modified surfaces, which was considered mainly due to the inhibitory effect of heparin to SMCs. According to the existing results, this study demonstrated that in a certain range of heparin and laminin concentration ratio, the biological behavior of platelets, ECs, EPCs and SMCs could be selectively directed. We suggested that this article provided a potential method to construct an adequate platform on a stent surface for accelerate endothelialization with low side effects. (C) 2014 Elsevier B.V. All rights reserved.
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